Home / 1,765.24-2,435.78-979.32

Finding the Fourth Proportional to 1,765.24, 2,435.78 and 979.32

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Solution

The fourth proportional to 1,765.24, 2,435.78 and 979.32 is: 1,351.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.24 : 2,435.78 = 979.32 : x
  2. Step 2: Convert to fraction form
    1,765.24/2,435.78 = 979.32/x
  3. Step 3: Cross multiply
    1,765.24x = 2,435.78 × 979.32
  4. Step 4: Simplify right side
    1,765.24x = 2,385,408.07
  5. Step 5: Solve for x
    x = 2,385,408.07/1,765.24
  6. Step 6: Final answer
    x = 1,351.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.